Grease-cup



F. G. HIRST.

GREASE CUP.

APPLICATION FILED DEC. 14. I918.

Patented Oct. 14, 1919.

FRANKLIN G. HIZRST, OF PHILADELPHIA, PENNSYLFANIA.

GREASE- CUP.

Specification of Letters Patent.

Patented 0a. 14, 1919.

Application filed December 14, 1918. Serial No. 266,699.

To all whom it may concern:

Be it known that I, FRANKLIN G. HIRs'r, a citizen of the United States, residing at liverypassage being controlled by a membermovable with the pressure device so as to gradually increase the area of such passage as the pressure upon the lubricant decreases.

The objects of the present invention are to rovide a rease cup of the class descri d, the out et of which is controlled by a transversely moving piston, operable in I the nozzle structure of said cup, the opening and closing movement thereof being regulated by the pressure of the grease actuated upon by the plunger and compression means connected with said piston to cause a reverse movement of the same as the plunger pressure diminishes.

These and other objects I attain in the manner hereinafter set forth, reference be ing had to the accompanying drawings, in which Figure 1 is a vertical sectional view of a lubricator constructed in accordance with my invention, the transversely moving piston being shown in an open position; and

Fig. 2 is a like vertical sectional view with the transversely moving piston in a closed position, prior to the lubricator being regulated for operation.

Like reference characters refer to like parts throughout the drawings.

Referringl to the drawings in detail the numeral 1 signates the body or cup of the lubricator, the interior portion 2 thereof comprising a receptacle for the lubricant, closed at the top by a cap or cover 3, and has at the bottom the nozzle structure 4 in which is formed the valve controlled outlet passage 5 of the cup.

The said cap 3 is provided with the usual threaded plunger stem 6 of a plunger 7 which fits snugly to the inner wall of the cup 1 and is acted upon by a coiled spring 8 d sposed between the underside of the cover 3 and the plunger 7 and tending to constantly depress said plunger. The threaded stem 6 passes freely through an opening in the cover 3 and is provided above said cover with a thumb or adjusting nut 9. By means of this adjusting or winged nut 9 the plunger 7 is drawn to its uppermost position in' the cup.

A transversely moving piston 10, having the stem 11, is adapted for movement in atransverse opening 12 in the nozzle structure 4, and has a port 13 communicating with a port 14 ofthe cup so as to provide a con-' tinuous passage for the lubricant from the cup 1 to the outlet passage 5.

A passage 15 is provided as shown to admit the lubricant from the body of the cup to the chamber 16 which has an opening in the side thereof for communication with said piston 10.

An adjusting screw 17 is threaded into the opening of the transverse passage 12, as illustrated, and the piston stem 11 passes therethrough. At the opposite extremity of the piston from the chamber 16 a spiral spring 18 is positioned around the stem 11 and between the walls of the passage 12 and abuts against the piston at one end and the screw 17 at the other end, so that by the action of said screw 17 the tension of the spring 18 may be increased or decreased.

In operation: When the plunger 7 is're leased from its uppermost position the greatest pressure is exerted. The expansion pressure of the plunger spring 8 belng greater than that of the spring 18 the lubricant under such pressure is forced through the passage 15 into the chamber 16 and against the end of piston 10, which by reason of such pressure thereagainst is forced laterally into a closed position as particularly illustrated in Fig. 2, or to a predetermined closing position governed by the regulating screw 17 compressing the spring 18 thereby increasing the resistance agalnst the plunger pressure. As the plunger pres sure diminishes by the weakening of the plunger spring 8 the piston remains unchanged in its position until the plunger spring pressure becomes weaker than the pressure of the spring 18, when, as said spring 18 gains force the valve gradually opens against the pressure exerted by the plunger, such opening moving continuing until the plunger has completed its stroke.

The greatest force of the plunger pressure is exerted at, substantially, the first quarter part of its stroke and unless this initial pressure is throttled an excess delivery of lubricant follows.

lVhen the piston 10 is in the position illustrated in Fig. 2 the outlet is sealed and no lubricant can leave the cup. T he requi site pressure to cause opening movement thereof against the pressure of the plunger spring 8 is regulated by means of the adjusting nut 17.

It is obvious that minor modifications may be made in the construction and position of the means controlling the outlet, without departing from the scope of my invention.

I claim:

1. In a grease cup provided with a spring actuated plunger and a valve controlled outlet whereby as the plunger descends the lubricant will force said valve into a closing position and compression means, weaker than the plunger pressure, connected with said valve whereby as the plunger pressure weakens and the valve compression means gain force opening movement of the valve is effected against the diminishing plunger pressure.

2. In a grease cup provided with a' spring actuated plunger and a valve controlled outlet whereby movement of said valve is caused by the pressure of the lubricant as the plunger descends and compression means in connection with said valve, weaker than the plunger pressure, to cause a reverse movement of said valve as the plunger pressure diminishes.

3. In a grease cup provided with a spring actuated plunger and a valve controlled outlet whereby lateral movement of said valve is caused by the pressure of the lubricant as the plunger descends and compression means in connection with said valve, weaker than the plunger pressure, to cause a reverse movement thereof as the plunger pressure diminishes.

4. In a grease cup provided with a spring actuated plunger, a nozzle structure, a transverse opening therein, a transversely moving valve adapted for movement in said opening, a port in said valve communicating with a like port in said cup and the outlet thereof, a passage from the body of said cup to a chamber provided in said nozzle structure, said'valve communicating with said chamber, and compression means connected with said valve, such compression means being weaker than the plunger pressure whereby as the spring plunger descends the lubricant will force said valve laterally gradually closing the outlet of said cup and causing movement of the valve as the plunger pressure diminishes.

v 5. In a grease cup provided with a spring actuated plunger, a nozzle structure, a transverse opening therein, a transversely moving valve adapted for movement in said opening, a port in said valve communicating with a like port in said cup and the outlet thereof, a passage from the body of said cup to a chamber provided in said nozzle structure, said valve communicating with said chamber, and compression meansconnected with said valve, such compression means being weaker than the plunger pressure whereby as the spring plunger descends the lubricant will force said valve laterally gradually closing the outlet of said cup and causing movement of the valve as the plunger pressure diminishes and means to limit the opening and closing movement of said valve to a predetermined position.

In testimony whereof I affix my signature in the presence of two witnesses.

FRANKLIN G. HIRST.

Witnesses MAHLoN VAN BOOSKIRK, JAMES S. CLIFFORD. 

